Power-driven fan



Jan. 1. 1924 1,479,619

J. MARTINEZ POWER DRIVEN FAN Filed Sept. 29 1922 gmenloz 50's. Martinez Patented Jan. 1, 1924.

UNITED STATES Josn MARTINEZ, or PALMDALE, CALIFORNIA.

POWER-DRIVEN FAN.

Application filed September 29, 1922. Serial No. 591,421.

To all whom it may concern:

Be it known that I, Jo'sn MARTINEZ, a citizen of Mexico, residing at Palmdale, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Power Driven Fans, of which the following is a specification. a

This invention relates to fans, having more particular reference to a rotary fan provided with power mechanism adapted to be wound up by hand the invention having for an object to provide a simple construction of fan of the above type other objects of the invention relating specifically to the ready locking and release of the rotary element.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the follow ing description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

Fig. 1 of the drawings is an axial sec tional View, with parts in elevation, of a fan constructed according to my invention.

Fig. 2 is a horizontal sectional view thereof, taken on the line 22 of Fig. 1.

Fig. 3 is a detail face view of the power band twisting member.

Fig. 4 is a side elevation of my improved fan showing a modified form of supporting bracket.

As here embodied my improved fan comprises a tubular post on the upper part of which a cylindrical hub 11 is rotatably mounted, being held against longitudinal displacement at its upper end by the antifriction bearing members 12, and at its lower end by the co-operating flanges 13 and 14 on the post and hub. On the hub 11 are mounted a number of fan blades 15 arranged in diametrically opposed pairs.

The hub is adapted to be rotated by a pair of rubber straps 18 which extend through the post 10, which is open at the top, and connect at one end to a cap 11' on the hub 11 and at their opposite ends to a rotary cylindrical block 19 suitably swiveled in the post 10. Rotary motion is imparted to this block 19 by means of a pin 20 carried by a sleeve 21 slidable on the post and projecting through a vertical slot 22 in the post 10 into a helical groove 23 in the block 19, this groove comprising right and left hand branches each extending half way around the block and uniting at opposite ends. At the points where the two branches join each other at each end of the block 19 a pawl 25 is pivoted and is normally held by a spring 26 in a position projecting across one branch of the groove so as to prevent the pin 20, after leaving said branch, from immediately re-entering the same.

Reciprocation of the sleeve 21 is effected by means of an apertured handle 30 pivotally attached as at 31 to the sleeve and to which further reference will presently be made.

To lock the hub 11 against rotation while the straps 18 are being twisted I provide a pawl 31 pivoted as at 32 to a bracket fixed to the post 10 and adapted to engage in any one of a number of notches 33 in a flange 34 formed on the hub 11, the pawl being normally pressed into engagement with said flange by a spring 35 bearing on a tail-piece 35 on the pawl.

The handle 30, above referred to, projects into close proximity to the tail-piece 35' and is normally pressed against the latter by a spring 36 fixed at one end on the sleeve 21 and bearing against a tail-piece 30 on the handle. The strength of spring 36 is sufiicient to overcome spring 35. Fixed to the handle 30 is a pin 37 which is adapted to engage in a suitable hole in the post 10 when the handle is engaged with the tail-piece 35, thus preventing the sleeve 21 sliding downward on the post.

The manner of use and operation of my improved fan is as follows: To twist the rubber straps 18 together the handle 30 is pulled outwardly to free the pawl 31 and is then moved up and down, causing the block 19 to rotate. When suflicient tension has been placed on the straps 18 the handle 30 is finally moved to its top position and allowed to swing inwardly, the handle bearing on the tail-piece 35 of pawl 35 and disengaging the latter from the flange 34 on hub 11, allowing the hub, and with it the fan blades 15 to rotate. The engagement of the pin 37 on the post prevents the sleeve from sliding downward on the post, as will be apparent.

In Fig. l of the drawings I have shown my fan as provided with a base 40 which may be set on a suitable horizontal surface, while in Fig. 4 I have shown it supported by a bracket arm. It is to be understood of course, that the terms upper-and lower as use in the foregoing description; have reference to the parts as shown in the drawing, it being apparent that the fan in use may be set at any desired angle.

Having thus described my invention what I claim as new and desire to protect by Letters Patent of the United States is as follows 1. A fan comprising a series of blades, a support on which said blades are rotatably mounted, a pair of rubber straps attached at one end to said blades, a rotary member to which the other ends of said straps are attached, and a device recipro'cable along said support and adapted to impart rotation in the same direction to said rotary member as the device is reciprocated;

2. A fan comprising a tubular post, a series of blades rotatably mounted thereon, a pair of rubber straps extending through said post and connected atone end with said blades, a block rotatable in said post and having the opposite ends of said straps attached thereto said post being formed with a helical groove presenting right and left hand branches uniting at their ends, and means for rotating said block to twist said straps together, saig means including a sleeve stat-e16 on sai' sa, ans pie fixed in said sleeve and projecting through a longitudinal slot in said post into said helical groove.

3. A fan comprising a tubular post, a series of blades rotatably mounted thereon, a pair of rubber straps extendin through said post and connected at one en with said blades, a block rotatable in said post and having the opposite ends of said straps attached thereto said post being *formed with a helical groove presenting right and left hand branches uniting at their ends, and means for rotating said block to twist said straps together, said means including a sleeve slidable on said post, and a pin fixed in said sleeve and projecting through a Tongitudin'al slot in said post into said helical groove, a handle inova-bly mounted on said sleeve, a pawl for holding said blades against rotation, and a spring acting on said handle to urge the latter against the pawl and disengage the saine from looking position.

In testimony whereof I have affixed my signature.

Jose MARTINEZ. 

